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The intention of this course is to show how harmonics are generated by modern electrical and electronic systems. It starts with classical harmonic generators and some older electronic devices. It emphasizes single phase systems and how harmonics are generated by diodes, silicon controlled rectifiers, and triacs. Special emphasis is made of the fact that it is the harmonic currents that flow that cause the harmonic voltages to be present. These harmonic voltages can affect other equipment, and even other customers on the electric grid. Many pictures and graphs are presented to show how harmonics can be present. At times, it is not at all obvious that harmonics are present in a signal. Even if they are not seen, the harmonics can cause problems for the power companies, which have the responsibility of delivering clean usable power to their customers.
This course was designed for electrical engineers as well as engineers of other disciplines. Electrical engineers will have a deeper understanding of how harmonics are generated. Engineers from other disciplines will get an idea of the problems faced by the people responsible for delivering power to their facilities. This will help engineers understand each others special problems. The more that we, as engineers, understand the problems faced by other engineers, the better that we will be able to do our specific jobs.
There is very little math involved I doing this course. Graphs were generated by use of Excel programs. It helps, but is not necessary, to understand how Excel can generate graphs and charts.
Examples are given at the end of the course showing how the third harmonic can cause excessive neutral currents to flow in a three phase Wye voltage source feeding a three phase balanced resistive load.
Needless to say, the real industrial world is not nearly as clean and nice as we would like it to be. These examples only show what is expected to happen. What really does happen as harmonics are generated will usually be close to what is expected. In any case, actually measuring the harmonics present with a power analyzer will give you the harmonics that are actually present.
In this 2 hour web-based
seminar, you'll learn....
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Historical causes of harmonic distortion.
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Harmonics of a square wave.
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Harmonics caused by half wave single phase rectifiers.
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Harmonics caused by full wave single phase rectifiers.
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Harmonics in three phase systems.
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Understanding harmonic generation in 6 and 12 pulse full wave rectifiers.
To attend
this web seminar, you'll
need a computer with a high speed internet connection (DSL or
cable modem) and a phone line. For your comfort, it is recommended that
you use a speaker phone to connect to the web seminar.
Online registration ends
1 hour prior to
the seminar, however phone registration can be accepted up to 10 minutes
before the webinar begins. Please call 877 500-7145 (toll free) for
last-minute registration. Seminars fill up fast. Register early to reserve
your spot!
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Accessing the Web Seminar |
Twenty-four hours prior
to the webinar, you will be emailed a web address for the webinar. On
the day of the seminar, simply go to the website provided in the e-mail (you
should be able to just click on the link in the e-mail). You will be
asked to enter your name and e-mail address. And you will need to
enter the password that was also sent to you in the e-mail. Once you
have logged in, a screen will pop up with the toll-free number to call.
Please try to log in at least 5 minutes prior to the webinar as we will
start promptly.
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Printing Your Certificate |
After completion of the web seminar, you will
need to fill out a short online questionnaire to access your certificate of
completion. The questionnaire can be accessed immediately after the
seminar through your login account. In the questionnaire, you will
assess how well the seminar achieved the stated learning objectives.
You may cancel your enrollment in this web
seminar up to 48
hours prior to the seminar with a full refund, minus a $10 registration
service fee. Cancellations made less than 48 hours prior to the
seminar, but at least 4 hours prior to the seminar will not be refunded, but
will be credited towards future seminars. Cancellations made less than
4 hours prior to the seminar are not refundable.
Web seminars earn PDH credits for engineers in
all states, unless specifically stated otherwise in the literature for a
specific seminar. PDHengineer.com is an approved provider of
continuing education for engineers. For more details, check out your state requirements.
ATTENTION
NEW YORK ENGINEERS: This web seminar has been accepted by the
state licensing board and will fulfill the "live course" requirement.
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